amxmodx/dlls/pgsql/CVector.h

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/* AMX Mod X
*
* by the AMX Mod X Development Team
* originally developed by OLO
*
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* In addition, as a special exception, the author gives permission to
* link the code of this program with the Half-Life Game Engine ("HL
* Engine") and Modified Game Libraries ("MODs") developed by Valve,
* L.L.C ("Valve"). You must obey the GNU General Public License in all
* respects for all of the code used other than the HL Engine and MODs
* from Valve. If you modify this file, you may extend this exception
* to your version of the file, but you are not obligated to do so. If
* you do not wish to do so, delete this exception statement from your
* version.
*/
#ifndef __CVECTOR_H__
#define __CVECTOR_H__
// Vector
template <class T> class CVector
{
bool Grow()
{
// automatic grow
size_t newSize = m_Size * 2;
if (newSize == 0)
newSize = 8; // a good init value
T *newData = new T[newSize];
if (!newData)
return false;
if (m_Data)
{
memcpy(newData, m_Data, m_Size * sizeof(T));
delete [] m_Data;
}
m_Data = newData;
m_Size = newSize;
return true;
}
bool GrowIfNeeded()
{
if (m_CurrentUsedSize >= m_Size)
return Grow();
else
return true;
}
bool ChangeSize(size_t size)
{
// change size
if (size == m_Size)
return true;
T *newData = new T[size];
if (!newData)
return false;
if (m_Data)
{
memcpy(newData, m_Data, (m_Size < size) ? (m_Size * sizeof(T)) : (size * sizeof(T)));
delete [] m_Data;
}
if (m_Size < size)
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m_CurrentSize = size;
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m_Data = newData;
m_Size = size;
return true;
}
void FreeMemIfPossible()
{
}
protected:
T *m_Data;
size_t m_Size;
size_t m_CurrentUsedSize;
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size_t m_CurrentSize;
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public:
class iterator
{
protected:
T *m_Ptr;
public:
// constructors / destructors
iterator()
{
m_Ptr = NULL;
}
iterator(T * ptr)
{
m_Ptr = ptr;
}
// member functions
T * base()
{
return m_Ptr;
}
const T * base() const
{
return m_Ptr;
}
// operators
T & operator*()
{
return *m_Ptr;
}
T * operator->()
{
return m_Ptr;
}
iterator & operator++() // preincrement
{
++m_Ptr;
return (*this);
}
iterator operator++(int) // postincrement
{
iterator tmp = *this;
++m_Ptr;
return tmp;
}
iterator & operator--() // predecrement
{
--m_Ptr;
return (*this);
}
iterator operator--(int) // postdecrememnt
{
iterator tmp = *this;
--m_Ptr;
return tmp;
}
bool operator==(T * right) const
{
return (m_Ptr == right);
}
bool operator==(const iterator & right) const
{
return (m_Ptr == right.m_Ptr);
}
bool operator!=(T * right) const
{
return (m_Ptr != right);
}
bool operator!=(const iterator & right) const
{
return (m_Ptr != right.m_Ptr);
}
iterator & operator+=(size_t offset)
{
m_Ptr += offset;
return (*this);
}
iterator & operator-=(size_t offset)
{
m_Ptr += offset;
return (*this);
}
iterator operator+(size_t offset) const
{
iterator tmp(*this);
tmp.m_Ptr += offset;
return tmp;
}
iterator operator-(size_t offset) const
{
iterator tmp(*this);
tmp.m_Ptr += offset;
return tmp;
}
T & operator[](size_t offset)
{
return (*(*this + offset));
}
const T & operator[](size_t offset) const
{
return (*(*this + offset));
}
bool operator<(const iterator & right) const
{
return m_Ptr < right.m_Ptr;
}
bool operator>(const iterator & right) const
{
return m_Ptr > right.m_Ptr;
}
bool operator<=(const iterator & right) const
{
return m_Ptr <= right.m_Ptr;
}
bool operator>=(const iterator & right) const
{
return m_Ptr >= right.m_Ptr;
}
size_t operator-(const iterator & right) const
{
return m_Ptr - right.m_Ptr;
}
};
// constructors / destructors
CVector<T>()
{
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m_Size = 0;
m_CurrentUsedSize = 0;
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m_Data = NULL;
}
CVector<T>(const CVector<T> & other)
{
// copy data
m_Data = new T [other.m_Size];
m_Size = other.m_Size;
m_CurrentUsedSize = other.m_CurrentUsedSize;
memcpy(m_Data, other.m_Data, m_CurrentUsedSize * sizeof(T));
}
~CVector<T>()
{
clear();
}
// interface
size_t size() const
{
return m_CurrentUsedSize;
}
size_t capacity() const
{
return m_Size;
}
iterator begin()
{
return iterator(m_Data);
}
iterator end()
{
return iterator(m_Data + m_CurrentUsedSize);
}
iterator iterAt(size_t pos)
{
if (pos > m_CurrentUsedSize)
ASSERT(0);
return iterator(m_Data + pos);
}
bool reserve(size_t newSize)
{
return ChangeSize(newSize);
}
bool push_back(const T & elem)
{
++m_CurrentUsedSize;
if (!GrowIfNeeded())
{
--m_CurrentUsedSize;
return false;
}
m_Data[m_CurrentUsedSize - 1] = elem;
return true;
}
void pop_back()
{
--m_CurrentUsedSize;
if (m_CurrentUsedSize < 0)
m_CurrentUsedSize = 0;
// :TODO: free memory sometimes
}
bool resize(size_t newSize)
{
if (!ChangeSize(newSize))
return false;
FreeMemIfPossible();
return true;
}
bool empty() const
{
return (m_CurrentUsedSize == 0);
}
T & at(size_t pos)
{
if (pos > m_CurrentUsedSize)
{
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ASSERT(0);
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}
return m_Data[pos];
}
const T & at(size_t pos) const
{
if (pos > m_CurrentUsedSize)
{
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ASSERT(0);
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}
return m_Data[pos];
}
T & operator[](size_t pos)
{
return at(pos);
}
const T & operator[](size_t pos) const
{
return at(pos);
}
T & front()
{
if (m_CurrentUsedSize < 1)
{
ASSERT(0);
}
return m_Data[0];
}
const T & front() const
{
if (m_CurrentUsedSize < 1)
{
ASSERT(0);
}
return m_Data[0];
}
T & back()
{
if (m_CurrentUsedSize < 1)
{
ASSERT(0);
}
return m_Data[m_CurrentUsedSize - 1];
}
const T & back() const
{
if (m_CurrentUsedSize < 1)
{
ASSERT(0);
}
return m_Data[m_CurrentUsedSize - 1];
}
bool insert(iterator where, const T & value)
{
// we have to insert before
// if it is begin, don't decrement
if (where != m_Data)
--where;
// validate iter
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if (where < m_Data || where >= (m_Data + m_CurrentUsedSize))
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return false;
++m_CurrentUsedSize;
if (!GrowIfNeeded())
{
--m_CurrentUsedSize;
return false;
}
memmove(where.base() + 1, where.base(), m_CurrentUsedSize - (where - m_Data));
memcpy(where.base(), &value, sizeof(T));
return true;
}
void erase(iterator where)
{
// validate iter
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if (where < m_Data || where >= (m_Data + m_CurrentUsedSize))
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return false;
if (m_CurrentUsedSize > 1)
{
// move
memmove(where.base(), where.base() + 1, m_CurrentUsedSize - 1);
}
--m_CurrentUsedSize;
// :TODO: free memory sometimes
}
void clear()
{
m_Size = 0;
m_CurrentUsedSize = 0;
delete [] m_Data;
m_Data = NULL;
}
};
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#endif // __CVECTOR_H__